I am a bit worried. The guests did not come in the time the said they were going to. I can not get hold of them. I have messaged them a few times. Not sure what to do. I have left the house now and messaged where the key is. I am worried they are going to turn up and not see the messages
Sounds like you have done all you can by sending messages and leaving info on where the key is etc. If they find themselves locked out, then they will phone you and you can let them know that you have been messaging them and go no reply